public boolean sumAEqualsSumB_2(int[] a, int[] b)

Given two arrays - a and b - both of whose lengths are 2,
return true if the sum of a's elements equals the sum of b's elements.

public boolean sumAEqualsSumB_2(int[] a, int[] b) {
  boolean equals = false;
  int sumA = a[0] + a[1];
  int sumB = b[0] + b[1];
  if (sumA == sumB) {
    equals = true;
  }
  return equals;
}